check engine light doesnt want to go off

[donjuan143]

could anyone tell me what might be wrong with my car, i took my car to the dealer three times and still i get the check engine light.
they have changed the mass air flow three time now!

i checked for the error codes and this is what i get:-

P0446
Porsche fault code 95 - Shutoff valve activated
charcoal filter (function)


P1128
Porsche fault code 360 - Oxygen sensing adaptation
idle range bank 1


P1130
Porsche fault code 361 - Oxygen sensing adaptation
idle range bank 2


PS my car was with the dealer for more than a month and they still couldnt fix it.